hello,

i found some info on the internet regarding old korg filters,
but i don't know if the information is correct.

the korg 700/700s/800dv have sallen&key type 2-pole filters
with diodes. the circuitry is described as hybrid( ).

the korg 770 filters are also sallen&key 2-pole with diodes,
but the circuitry is discrete.

finally the ms50 is sallen&key 2-pole with a diode array.

as i said, i don't know if this is true or false information,
i just found it on a japanese homepage.

best wishes

ingo




--- In Doepfer_a100@yahoogroups.com , Florian Anwander
<Florian.Anwander@c...> wrote:

> Hi Ingo
>
> > maybe we can come close enough to the sound of the old
> > korgs with the planned ms20 modules. also we have to make
> > sure that we don't get a filter overkill. together with the
> > ms20 filters we have more than 20 filter in the doepfer range.
> The 800DV synth sounds very nice. I think it is based on two 12dB
> OTA-based Filters. Those 12 dB filters sound definitely different

from

> the A121 though they use basically the same circuit principles. It

could

> be worth as an replacement of the A121.
>
> Florian